Shimmer decorative backdrop panel



FIG. 1 is a top, right and front side perspective view of a shimmer decorative backdrop panel, showing my new design;

FIG. 2 is a back side perspective view thereof;

FIG. 3 is front elevational view thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for a shimmer decorative backdrop panel, as shown and described. 